Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (23.5mm, 3.86 g, 5h). PRINCIPI Two Standards Type. Londinium (London) mint. Struck circa AD 311-312. Laureate, helmeted, and cuirassed bust left, holding spear forward in right hand, shield on left arm / Constantine I standing left, holding signum in each hand; –|*//PLN. RIC VI –; C&T 7.06.017. Brown patina, light roughness, reverse die wear. Good VF. Very rare.

From the Paul DiMarzio Collection, purchased from Perry Siegel (Herakles Numismatics) at the New York International Numismatic Convention, 14 January 2006.